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/*******************************************************************************
* Copyright 2009-2016 Jörg Müller
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
#include "sequence/DoubleReader.h"
#include <cstring>
AUD_NAMESPACE_BEGIN
DoubleReader::DoubleReader(std::shared_ptr<IReader> reader1, std::shared_ptr<IReader> reader2) :
m_reader1(reader1), m_reader2(reader2), m_finished1(false)
{
Specs s1, s2;
s1 = reader1->getSpecs();
s2 = reader2->getSpecs();
}
DoubleReader::~DoubleReader()
{
}
bool DoubleReader::isSeekable() const
{
return m_reader1->isSeekable() && m_reader2->isSeekable();
}
void DoubleReader::seek(int position)
{
m_reader1->seek(position);
int pos1 = m_reader1->getPosition();
if((m_finished1 = (pos1 < position)))
m_reader2->seek(position - pos1);
else
m_reader2->seek(0);
}
int DoubleReader::getLength() const
{
int len1 = m_reader1->getLength();
int len2 = m_reader2->getLength();
if(len1 < 0 || len2 < 0)
return -1;
return len1 + len2;
}
int DoubleReader::getPosition() const
{
return m_reader1->getPosition() + m_reader2->getPosition();
}
Specs DoubleReader::getSpecs() const
{
return m_finished1 ? m_reader1->getSpecs() : m_reader2->getSpecs();
}
void DoubleReader::read(int& length, bool& eos, sample_t* buffer)
{
eos = false;
if(!m_finished1)
{
int len = length;
m_reader1->read(len, m_finished1, buffer);
if(len < length)
{
Specs specs1, specs2;
specs1 = m_reader1->getSpecs();
specs2 = m_reader2->getSpecs();
if(AUD_COMPARE_SPECS(specs1, specs2))
{
int len2 = length - len;
m_reader2->read(len2, eos, buffer + specs1.channels * len);
length = len + len2;
}
else
length = len;
}
}
else
{
m_reader2->read(length, eos, buffer);
}
}
AUD_NAMESPACE_END
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